Pearlitic rail and method for manufacturing pearlitic rail
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United States of America Patent
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Apr 9, 2019
Grant Date -
Mar 24, 2016
app pub date -
Mar 25, 2014
filing date -
Mar 27, 2013
priority date (Note) -
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Abstract
A pearlitic rail includes a composition including in % by mass: 0.70% to 0.90% of C; 0.1% to 1.5% of Si; 0.01% to 1.5% of Mn; 0.001% to 0.035% of P; 0.0005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities. Surface hardness of a rail top is not less than HB 430, and hardness at a depth of 25 mm from a surface of the rail top is not less than HB 410.
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